Changes between Version 224 and Version 225 of AstroTechTalk

Timestamp:

10 Oct 2016, 09:16:42 (8 years ago)

Author:

Ralph Hofferbert

Comment:

--

AstroTechTalk

@@ -30 +30 @@
 || '''07.10.2016''' || '''Silvia Scheithauer''' || '''CIAO - Wavefront sensors for GRAVITY[[BR]]'''[[BR]]GRAVITY  is a near-infrared instrument for the Very Large Telescope   Interferometer (VLTI) at the ESO Paranal observatory in Chile. GRAVITY  combines the light of all four 8,2m telescopes to mimic a virtual 130m telescope. The thereby possible, drastically increased sensitivity and resolution, however, can only be reached, if the image blur due to atmospheric turbulence above every single telescope is corrected by the real-time deformable mirrors of an adaptive optics system.  Hence, GRAVITY has to provide not only the „Beam Combiner Instrument“ (BCI) in the VLTI-lab, but also four infrared wavefront sensors to analyze the atmospheric turbulence. These wavefront sensors are located in the four  Coudé-rooms of the telescopes, therefore called „Coudé Infrared  Adaptive Optics“ (CIAO). [[BR]][[BR]]The CIAO wavefront sensors were built under the responsibility of MPIA in close cooperation with ESO and the MPE-led GRAVITY consortium. While the BCI has been installed already in October 2015 on Paranal, the assembly of the four CIAO systems lasted from February to September 2016. Currently, the scientific commissioning of the complete GRAVITY instrument is ongoing.[[BR]][[BR]]One important scientific goal is the observation of objects in the direct vicinity of the black hole in the center of our Milky Way. In addition, GRAVITY will allow to study young stellar objects and shaped-up stars with an unprecedented sensitivity. In spring 2017, when the galactic center is again observable from Paranal, observations of the star „S2“ will start. The close fly-by of this star relative to the black hole will allow to test Einstein's general theory of relativity with an extreme accuracy.  [[BR]][[BR]]Presentation: German                  [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-10-07_CIAO.pdf Slides: English][[BR]]Questions: German, English ||
 || 14.10.2016 || Claudia Reinlein (Fraunhofer IOF, Jena) || Deformable mirrors ||
-|| '''21.10.2016''' || '''Eike Guenther (TLS, Tautenburg)''' || '''Instrumentation projects of the [[BR]]Thüringer Landessternwarte''' '''Tautenburg '''[[BR]][[BR]]The Thüringer Landessternwarte (TLS) operates a 2m Alfred-Jensch telescope and a LOFAR radio telescope in Tautenburg and is involved in a number of instrumentation projects for various telescopes. In this talk the instrumentation of the telescopes in Tautenburg and other projects are reviewed. [[BR]][[BR]]Although the Alfred-Jensch telescope was built more than 50 years ago it is continuously upgraded with new instrumentation. Currently in use are a high-resolution Echelle spectrograph, which is used for exoplanet-research, and a low-resolution faint-object spectrograph. Additionally, there is also a CCD camera in the prime-focus, which is used for imaging. Building on the experience with these instruments the TLS also participated in a number of international instrumentation projects. The first one was GROND, a multi-channel camera for the ESO/MPG 2.2m telescope at La Silla. Others were the HERMES spectrograph for the Mercator telescope in La Palma and the two calibration units for CARMENES. Still ongoing is the upgrade of CRIRES to CRIRES+, which is a high-resolution NIR spectrograph for the VLT. Being studied is GTI, a multi-channel camera that is specifically designed for the follow-up observations of exoplanet candidates of TESS and PLATO. [[BR]][[BR]]The TLS also hosts a LOFAR station. LOFAR is the Low-Frequency Array, an instrument for performing radio astronomy in the wavelength range from 1.2 to about 10 m. It is being built by ASTRON, the Netherlands Institute for Radio Astronomy and its international partners, and operated by ASTRON's radio observatory of the Netherlands Organisation for Scientific Research. About 40 stations are located in the Netherlands, additional ones are in Great Britain, France, Sweden, and Germany.[[BR]][[BR]]Presentation: German                  [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-10-21_TLS.pdf Slides: English][[BR]]Questions: German, English ||
+|| '''21.10.2016''' || '''Eike Guenther (TLS, Tautenburg)''' || '''Instrumentation projects of the [[BR]]Thüringer Landessternwarte''' '''Tautenburg '''[[BR]][[BR]]The Thüringer Landessternwarte (TLS) operates a 2m Alfred-Jensch telescope and a LOFAR radio telescope in Tautenburg and is involved in a number of instrumentation projects for various telescopes. In this talk the instrumentation of the telescopes in Tautenburg and other projects are reviewed. [[BR]][[BR]]Although the Alfred-Jensch telescope was built more than 50 years ago, it is continuously upgraded with new instrumentation. Currently in use are a high-resolution Echelle spectrograph, which is used for exoplanet-research, and a low-resolution faint-object spectrograph. Additionally, there is also a CCD camera in the prime-focus, which is used for imaging. Building on the experience with these instruments the TLS also participated in a number of international instrumentation projects. The first one was GROND, a multi-channel camera for the ESO/MPG 2.2m telescope at La Silla. Others were the HERMES spectrograph for the Mercator telescope in La Palma and the two calibration units for CARMENES. Still ongoing is the upgrade of CRIRES to CRIRES+, which is a high-resolution NIR spectrograph for the VLT. Being studied is GTI, a multi-channel camera that is specifically designed for the follow-up observations of exoplanet candidates of TESS and PLATO. [[BR]][[BR]]The TLS also hosts a LOFAR station. LOFAR is the Low-Frequency Array, an instrument for performing radio astronomy in the wavelength range from 1.2 to about 10 m. It is being built by ASTRON, the Netherlands Institute for Radio Astronomy and its international partners, and operated by ASTRON's radio observatory of the Netherlands Organisation for Scientific Research. About 40 stations are located in the Netherlands, additional ones are in Great Britain, France, Sweden, and Germany.[[BR]][[BR]]Presentation: German                  [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2016S2/2016-10-21_TLS.pdf Slides: English][[BR]]Questions: German, English ||
 || 28.10.2016 || Santiago Barboza || The MICADO de-rotator test stand ||
 || 04.11.2016 || Stefan Hippler || Adaptive optics for VLT and E-ELT ||